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A151521 as a simple table

n a(n)
1 1
2 3
3 4
4 13
5 25
6 72
7 166
8 450
9 1124
10 2973
11 7603
12 19865
13 51199
14 132982
15 343290
16 888309
17 2292325
18 5918742
19 15258937
20 39329418 

[1,3,4,13,25,72,166,450,1124,2973,7603,19865,
 51199,132982,343290,888309,2292325,5918742,
 15258937,39329418]

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Last modified April 24 13:08 EDT 2024. Contains 371945 sequences. (Running on oeis4.)